8 Bad Skin Habits That'll Shock You

You know your diet coke addiction and sunbathing ways are bad for your skin, but read on to see the mistakes you don't even realize you're making

Skin sin no. 6: Taking supplements without a doc's approval Be wary of miracle supplements that are sold over-the-counter and not recommended by your dermatologist or primary care physician, says Wu, as they can interfere with prescribed medications. For example, calcium supplements can reduce the efficacy of medications like antibiotics or thyroid hormone pills. And vitamin D supplements can make Lipitor (a cholesterol-lowering medicine) less effective.

Wu says, even if you're not on any meds, "mixing supplements can be hazardous to your health." For example, mixing omega-3 fish oil supplements with other supplements like ginger, gingko, or even Advil, can lead to an increased risk of bleeding, which is especially dangerous if you're undergoing surgery or even a teeth cleaning.

Never realized milk was THAT evil.
Washing brushes once a week is not necessarily often enough, you really shouldn't even suggest once a month can be ok. This is terrifying. Once a month is ASKING for inflammations and acne.